Corrosion protection issues in steel frame buildings?
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During the design process, for the same steel frame, if a certain area is exposed to corrosive substances and therefore requires anti-corrosion treatment, does that mean areas without such corrosive substances also need to have anti-corrosion protection of the same standard? I would like to ask everyone how such corrosion prevention is considered?
Are you referring to the pipeline trench framework? If it is indeed a pipeline trench framework, then anti-corrosion treatment is required for it
Corrosion insurance is necessary; it’s just not entirely clear whether the grade should be upgraded
The equipment is not very large; they are generally of the same grade. For steel frames in chemical processing plants, fire resistance ratings also come into play, and fireproof coating is applied subsequently.
The device is relatively large, and normally anti-rust paint is applied to it
The specifications for corrosion protection of steel structures or cable trays in chemical plants include: 1. SHJ522—91 \"Code for Construction and Acceptance of Anti-corrosion Works in Buildings\"; 2. GB8923—88 \"Rust Grade and Derusting Grade of Steel Structure Surfaces before Painting\"; 3. HGJ229—91 \"Code for Construction and Acceptance of Anti-corrosion Works on Industrial Equipment and Pipelines\". The construction process is as follows: After the erection of the scaffolding is completed and approved, derusting work begins. Derusting can be carried out using power tools or manually, with the derusting level reaching St3. After this is approved, two coats of chlorosulfonated primer and two coats of topcoat are applied
GB8923—88 \"Corrosion Grades and Rust Removal Grades of Steel Structures Before Painting\" and HGJ229—91 \"Specifications for Corrosion Protection of Industrial Equipment and Pipelines and Related Acceptance Criteria\" – these two standards are no longer in force and have become obsolete
I’m sorry; I really didn’t check whether it had expired or not. Although the old standards are no longer in use, the new standards are pretty similar – only some of the anti-corrosion materials are better. The anti-corrosion procedures remain unchanged. What I mean is that you should take them as a reference, as this will help clarify your thoughts.